{"id":1753,"date":"2020-04-06T11:48:00","date_gmt":"2020-04-06T04:48:00","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1753"},"modified":"2023-11-23T12:24:52","modified_gmt":"2023-11-23T05:24:52","slug":"vietnam-journal-of-forest-science-number-1-2020","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2020\/04\/vietnam-journal-of-forest-science-number-1-2020\/","title":{"rendered":"Vietnam Journal of Forest Science Number 1-2020"},"content":{"rendered":"

\"\"<\/a><\/p>\n

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1<\/strong> – <\/strong>20<\/strong>20<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac t\u1ed5 th\u00e0nh\u00a0 v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc c\u00e1c qu\u1ea7n th\u1ec3 \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn (Rhododendron moulmainense<\/em> Hook. F.)
\nt\u1ea1i L\u00e2m \u0110\u1ed3ng<\/td>\n		Characteristics of composition and biodiversity of Rhododendron moulmainense<\/em> Hook. f. population in Lam Dong<\/td>\nL\u01b0u Th\u1ebf Trung
\nPh\u00ed H\u1ed3ng H\u1ea3i
\nTr\u1ea7n V\u0103n Ti\u1ebfn<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nKh\u1ea3o nghi\u1ec7m gi\u1ed1ng Thanh th\u1ea5t (Ailanthus triphysa<\/em> Alston) \u0111\u1ec3 tr\u1ed3ng r\u1eebng c\u00e2y b\u1ea3n \u0111\u1ecba t\u1ea1i Ph\u00fa Y\u00ean<\/td>\nThe breeding trial of Ailanthus triphysa<\/em> Alston for native-tree plantation in Phu Yen<\/td>\nPh\u1ea1m Th\u1ebf D\u0169ng
\nPh\u1ea1m V\u0103n B\u1ed1n
\nNguy\u1ec5n V\u0103n Thi\u1ebft<\/td>\n		12<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt tr\u1ed3ng th\u00e2m canh v\u00e0 b\u1ea3o qu\u1ea3n qu\u1ea3 Sa nh\u00e2n t\u00edm (Amomum longiligulare <\/em>T.L.Wu)\u00a0 t\u1ea1i khu v\u1ef1c ngo\u1ea1i th\u00e0nh H\u00e0 N\u1ed9i<\/td>\nResearch on intensive planting techniques and fruit preservation of (Amomum longiligulare<\/em> T.L.Wu) in a suburb of Ha Noi city<\/td>\nB\u00f9i Ki\u1ec1u H\u01b0ng
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/td>\n		21<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u sinh kh\u1ed1i\u00a0 r\u1eebng V\u1ea7u \u0111\u1eafng (Indosasa angustata <\/em>Mc.Clure) thu\u1ea7n lo\u00e0i t\u1ea1i t\u1ec9nh B\u1eafc K\u1ea1n<\/td>\nResearch on carbon sequestration of Indosasa angustata <\/em>Mc.Clure in Bac Kan province<\/td>\nNg\u00f4 Xu\u00e2n H\u1ea3i
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/td>\n		34<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 \u0111\u1ed9ng th\u00e1i sinh kh\u1ed1i\u00a0 r\u1eebng Lu\u1ed3ng (Dendrocalamus barbatus<\/em> Hsueh Et D. Z.Li) tr\u1ed3ng thu\u1ea7n lo\u00e0i t\u1ea1i Thanh H\u00f3a<\/td>\nResearch on biomass and biomass dinamics of pure Dendrocalamus barbatus<\/em> Hsueh et D. Z.Li plantation in Thanh Hoa province<\/td>\nNguy\u1ec5n \u0110\u1ee9c H\u1ea3i
\nNguy\u1ec5n Ho\u00e0ng Ti\u1ec7p<\/td>\n		46<\/td>\n<\/tr>\n
6.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i \u0111\u1ebfn m\u1eadt \u0111\u1ed9 ph\u00e2n b\u1ed1 Th\u00f4ng n\u0103m l\u00e1 (Pinus dalatensis<\/em> Ferr\u00e9)\u00a0 \u1edf T\u00e2y Nguy\u00ean<\/td>\nEcological factors impact on density distribution of Pinus dalatensis<\/em> Ferr\u00e9 species in the Central Highlands of Vietnam<\/td>\nL\u00ea C\u1ea3nh Nam
\nNguy\u1ec5n Th\u00e0nh M\u1ebfn
\nH\u1ed3 Ng\u1ecdc Th\u1ecd v\u00e0 B\u1ea3o Huy<\/td>\n		62<\/td>\n<\/tr>\n
7.<\/td>\n\u1ea2nh h\u01b0\u1edfng m\u1ed9t s\u1ed1 nh\u00e2n t\u1ed1 kh\u00ed h\u1eadu \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao th\u00e2n c\u1ee7a\u00a0 Th\u1ea1ch t\u00f9ng r\u0103ng (Huperzia serrata<\/em> (Thunb. Ex Murray) Trevis.) \u1edf Vi\u1ec7t Nam<\/td>\nEffect of climate elements on shoot growth of Huperzia serrata<\/em> from Vietnam<\/td>\nNguy\u1ec5n Th\u1ecb \u00c1i Minh
\nL\u00ea Ng\u1ecdc Tri\u1ec7u
\nTr\u1ea7n V\u0103n Ti\u1ebfn
\nN\u00f4ng V\u0103n Duy<\/td>\n		73<\/td>\n<\/tr>\n
8.<\/td>\nNghi\u00ean c\u1ee9u ph\u00e2n chia l\u1eadp \u0111\u1ecba v\u00f9ng ven bi\u1ec3n mi\u1ec1n Trung l\u00e0m c\u01a1 s\u1edf cho tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n<\/td>\nStudy on zoning sites for mangrove plantation in the Central Coastal Region<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i<\/td>\n84<\/td>\n<\/tr>\n
9.<\/td>\nTh\u00e0nh ph\u1ea7n lo\u00e0i x\u00e9n t\u00f3c (Coleoptera: Cerambycidae)\u00a0 t\u1ea1i r\u1eebng tr\u1ed3ng Th\u00f4ng m\u00e3 v\u0129, Th\u00f4ng nh\u1ef1a v\u00e0 Th\u00f4ng ba l\u00e1<\/td>\nComposition of longhorn beetles (Coleoptera: Cerambycidae) in Pinus massoniana, Pinus merkusii <\/em>and Pinus kesiya<\/em> plantations<\/td>\nNguy\u1ec5n V\u0103n Th\u00e0nh
\n\u0110\u00e0o Ng\u1ecdc Quang
\nTr\u1ea7n Vi\u1ebft Th\u1eafng v\u00e0 Trang A T\u1ed5ng<\/td>\n		98<\/td>\n<\/tr>\n
10.<\/td>\nForest plantations and smallholder livelihoods: evidence from Central Region of Vietnam<\/td>\nR\u1eebng tr\u1ed3ng v\u00e0 sinh k\u1ebf h\u1ed9 gia \u0111\u00ecnh: Tr\u01b0\u1eddng h\u1ee3p nghi\u00ean c\u1ee9u \u1edf mi\u1ec1n Trung Vi\u1ec7t Nam<\/td>\nProject investigators<\/td>\n110<\/td>\n<\/tr>\n
11.<\/td>\nHi\u1ec7u qu\u1ea3 kinh t\u1ebf m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh\u00a0 r\u1eebng tr\u1ed3ng keo g\u1ed7 l\u1edbn t\u1ea1i v\u00f9ng \u0110\u00f4ng B\u1eafc<\/td>\nEconomic efficiency of a number of saw log acacia plantation models in the Northeast region<\/td>\nV\u0169 V\u0103n Thu\u1eadn
\nDi\u1ec7p Xu\u00e2n Tu\u1ea5n
\nTr\u1ea7n Duy R\u01b0\u01a1ng
\nPh\u1ea1m \u0110\u00f4n
\nV\u0169 V\u0103n Tu\u00e2n<\/td>\n		123<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn\u00a0 g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei<\/em> Lecomte)<\/td>\nStudy on wood processing technology for Litsea pierrei<\/em> Lecomte<\/td>\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nH\u00e0 Ti\u1ebfn M\u1ea1nh
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng
\nNguy\u1ec5n Anh Tu\u1ea5n
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n B\u1ea3o Ng\u1ecdc<\/td>\n		133<\/td>\n<\/tr>\n
13.<\/td>\n\u0110\u00e1nh gi\u00e1 ph\u01b0\u01a1ng ph\u00e1p ba\u0309o qu\u1ea3n M\u1ed9c b\u1ea3n Tri\u1ec1u Nguy\u1ec5n b\u1ecb m\u1ee7n m\u1ee5c b\u0103\u0300ng Paraloid B72<\/td>\nConservation of royal wooden printing blocks of the Nguyen Dynasty using Paraloid B72<\/td>\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nNguy\u1ec5n Xu\u00e2n H\u00f9ng<\/td>\n		144<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC T\u1ed4 TH\u00c0NH V\u00c0 \u0110A D\u1ea0NG SINH H\u1eccC C\u00c1C QU\u1ea6N TH\u1ec2 \u0110\u1ed6 QUY\u00caN L\u00c1 NH\u1eccN (<\/em>Rhododendron moulmainense <\/em>Hook. F.)\u00a0T\u1ea0I L\u00c2M \u0110\u1ed2NG<\/p>\n

<\/a>L\u01b0u Th\u1ebf Trung1<\/sup>, Ph\u00ed H\u1ed3ng H\u1ea3i2<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn3<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n KHLN Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n b\u1ed1, c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh c\u00e2y \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn t\u1ea1i 3 qu\u1ea7n th\u1ec3 thu\u1ed9c t\u1ec9nh L\u00e2m \u0110\u1ed3ng. \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn th\u01b0\u1eddng m\u1ecdc trong r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng v\u1edbi c\u00e2y l\u00e1 kim v\u00e0 m\u1ed9t s\u1ed1 \u00edt trong r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh. Nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c lo\u00e0i ph\u00e2n b\u1ed1 tr\u00ean c\u00e1c lo\u1ea1i \u0111\u1ea5t m\u00f9n v\u00e0ng \u0111\u1ecf, h\u00e0m l\u01b0\u1ee3ng m\u00f9n t\u01b0\u01a1ng \u0111\u1ed1i cao, \u0111\u1ea5t c\u00f3 pH = 5,5 – 6. \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn th\u01b0\u1eddng m\u1ecdc t\u1eadp trung th\u00e0nh c\u1ee5m \u1edf s\u01b0\u1eddn \u0111\u1ed3i t\u1eeb \u0111\u1ed9 cao 1.350 – 1.750 m, nh\u01b0ng m\u1ecdc t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf \u0111\u1ed9 cao t\u1eeb 1.500 – 1.600 m, v\u00f9ng ph\u00e2n b\u1ed1 t\u1eadp trung c\u1ee7a lo\u00e0i t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Bidoup – N\u00fai B\u00e0 (huy\u1ec7n L\u1ea1c D\u01b0\u01a1ng) v\u00e0 \u0111\u1ec9nh H\u00f2n Nga (huy\u1ec7n \u0110am R\u00f4ng). Hoa th\u01b0\u1eddng n\u1edf t\u1eeb th\u00e1ng 9 n\u0103m tr\u01b0\u1edbc \u0111\u1ebfn th\u00e1ng 3 n\u0103m sau. \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t sinh th\u00e1i t\u1ea1i 2 qu\u1ea7n th\u1ec3 Bidoup v\u00e0 H\u00f2n Nga v\u1edbi hai ch\u1ec9 s\u1ed1 t\u01b0\u01a1ng \u1ee9ng IV = 5,16 – 5,57%. T\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y g\u1ed7 t\u1ea1i khu v\u1ef1c c\u00f3 \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn ph\u00e2n b\u1ed1 kh\u00e1 \u0111a d\u1ea1ng g\u1ed3m c\u00e1c lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf l\u00e0 Th\u00f4ng 2 l\u00e1 d\u1eb9t l\u00e0 lo\u00e0i \u01b0u th\u1ebf cao nh\u1ea5t v\u1edbi gi\u00e1 tr\u1ecb IV = 32,76%, D\u1ebb gai v\u1edbi gi\u00e1 tr\u1ecb IV = 16,8%. C\u00e2y t\u00e1i sinh \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn xu\u1ea5t hi\u1ec7n t\u1ea1i 2 qu\u1ea7n th\u1ec3 Tuy\u1ec1n L\u00e2m v\u00e0 Bidoup dao \u0111\u1ed9ng t\u1eeb 500 – 1.062 c\u00e2y\/ha, trong \u0111\u00f3 59% s\u1ed1 c\u00e2y \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn t\u00e1i sinh c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb ch\u1ed3i v\u00e0 ph\u1ea7n l\u1edbn \u0111\u1ea1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t. Gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a ch\u1ec9 s\u1ed1 Shannon v\u00e0 Simpson l\u1ea7n l\u01b0\u1ee3t l\u00e0 4,89 v\u00e0 0,053.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn, \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc, \u0111a d\u1ea1ng sinh h\u1ecdc, L\u00e2m \u0110\u1ed3ng<\/td>\n<\/tr>\n

Characteristics of composition and biodiversity of Rhododendron moulmainense<\/em> Hook. f. population in Lam Dong<\/strong><\/p>\n

The paper presents some characteristics of distribution, structure and regeneration of Rhododendron moulmainense <\/em>species in 3 populations in Lam Dong province. Rhododendron moulmainense<\/em> grows mainly in the broad-leaved and coniferous mixed forest and a small number in the evergreen broad-leaved forest. The research has determined species distributed on red yellow humus soils, relatively high humus content, soil pH = 5.5 – 6. Rhododendron moulmainense<\/em> usually grows in clusters on hillsides from an altitude of 1,350 – 1,750 m, but grows mainly at elevations from 1,500 – 1,600 m, the concentrated distribution of species in Bidoup – Nui Ba National Park (Lacduong district) and Hon Nga peak (Damrong district). Flowers usually bloom from September last year to March next year. Rhododendron moulmainense <\/em>brings ecologically significance in both Bidoup and Hon Nga populations with an index of IV = 5.16 – 5.57%. In the area of distribution of Rhododendron moulmailnense,<\/em> composition of timbers are very diverse), including the predominant species: Pinuskrempfii<\/em> is the highest dominant species with IV index at 32.76%, Castanopsis wilsonii <\/em>with IV indexat 16.8%. Rhododendron moulmainense <\/em>species regeneration in the two populations at Tuyen Lam and Bidoup, flexibility from 250 to 566 regenerated seedling per hectare, 59% of them are coppice regeneration and mostly of them have good quality. The average numbers of Shannon and Simpson are 4.89 and 0.053 respectively.<\/p>\n

Keywords:<\/em><\/strong> Rhododendron moulmainense<\/em>, silvicuture characteristics, biodiversity, Lam Dong<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>KH\u1ea2O NGHI\u1ec6M GI\u1ed0NG THANH TH\u1ea4T (Ailanthus triphysa<\/em> Alston) \u0110\u1ec2 TR\u1ed2NG R\u1eeaNG C\u00c2Y B\u1ea2N \u0110\u1ecaA T\u1ea0I PH\u00da Y\u00caN<\/p>\n

<\/a>Ph\u1ea1m Th\u1ebf D\u0169ng1<\/sup>, Ph\u1ea1m V\u0103n B\u1ed1n2<\/sup>, Nguy\u1ec5n V\u0103n Thi\u1ebft3<\/sup><\/p>\n

1<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p TP. H\u1ed3 Ch\u00ed Minh
\n2<\/sup>Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt Nam B\u1ed9
\n3<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1eed d\u1ee5ng c\u00e2y b\u1ea3n \u0111\u1ecba \u0111\u1ec3 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng cung c\u1ea5p g\u1ed7 l\u1edbn \u0111ang l\u00e0 h\u01b0\u1edbng ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng trong vi\u1ec7c n\u00e2ng cao gi\u00e1 tr\u1ecb gia t\u0103ng c\u1ee7a s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p. Vi\u1ec7c nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 c\u00e2y Thanh th\u1ea5t l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ed9i dung nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i c\u1ea5p B\u1ed9 \u0111\u01b0\u1ee3c Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2014-2018 t\u1ea1i mi\u1ec1n B\u1eafc, mi\u1ec1n Trung v\u00e0 \u0110\u00f4ng Nam B\u1ed9. M\u1ee5c ti\u00eau kh\u1ea3o nghi\u1ec7m gi\u1ed1ng t\u1ea1i Ph\u00fa Y\u00ean l\u00e0: Ch\u1ecdn \u0111\u01b0\u1ee3c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh Thanh th\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng \u0111\u1ec3 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng. Ph\u01b0\u01a1ng ph\u00e1p ch\u1ecdn c\u00e2y tr\u1ed9i v\u00e0 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo Ti\u00eau chu\u1ea9n ng\u00e0nh 04 TCN – 147 – 2006 c\u1ee7a B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n. K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m cho th\u1ea5y: C\u00f3 3 xu\u1ea5t x\u1ee9 Tuy\u00ean Quang, Qu\u1ea3ng Nam, Ph\u00fa Y\u00ean v\u00e0 14 gia \u0111\u00ecnh trong s\u1ed1 42 gia \u0111\u00ecnh c\u1ee7a 8 xu\u1ea5t x\u1ee9 c\u00f3 m\u1ee9c v\u01b0\u1ee3t th\u1ec3 t\u00edch th\u00e2n c\u00e2y h\u01a1n 10% so v\u1edbi trung b\u00ecnh c\u1ee7a 42 gia \u0111\u00ecnh tham gia trong kh\u1ea3o nghi\u1ec7m. Ngo\u00e0i ra, t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh v\u1ec1 D1<\/sub>,<\/sub>3 <\/sub>> 1,8 cm\/n\u0103m v\u00e0 chi\u1ec1u cao > 1,3 m\/n\u0103m l\u00e0 nh\u1eefng ch\u1ec9 s\u1ed1 kh\u00e1 t\u1ed1t \u0111\u1ed1i v\u1edbi lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba. C\u0103n c\u1ee9 c\u00e1c ch\u1ec9 ti\u00eau ch\u1ecdn gi\u1ed1ng th\u00ec c\u00f3 th\u1ec3 ch\u1ecdn 2 xu\u1ea5t x\u1ee9 Tuy\u00ean Quang (TQ), Qu\u1ea3ng Nam (QN) v\u1edbi c\u00e1c gia \u0111\u00ecnh TQ1, TQ2, TQ3 v\u00e0 QN6, QN17, QN24, QN27, QN33. Xu\u1ea5t x\u1ee9 Ph\u00fa Y\u00ean ch\u1ec9 c\u00f3 2 gia \u0111\u00ecnh tham gia kh\u1ea3o nghi\u1ec7m, n\u00ean c\u1ea7n ti\u1ebfp t\u1ee5c theo d\u00f5i, ch\u01b0a ch\u1ecdn l\u1ea7n n\u00e0y. Ngo\u00e0i ra, c\u00f2n c\u00f3 c\u00e1c gia \u0111\u00ecnh c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 kh\u00e1c l\u00e0 PT3, PT11; VP6, VP14; \u0110N12; BP18 c\u0169ng \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o c\u00e1c ch\u1ec9 ti\u00eau ch\u1ecdn gi\u1ed1ng v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y tr\u1ed9i, gia \u0111\u00ecnh, kh\u1ea3o nghi\u1ec7m, xu\u1ea5t x\u1ee9<\/td>\n<\/tr>\n

<\/a>The breeding trial of Ailanthus triphysa<\/em> Alston for native-tree plantation in Phu Yen<\/strong><\/p>\n

Use of the native species for afforestation to supply big woods is a solution toward sustained development of forest production. The study on selection of the best provenances and families of Ailanthus<\/em> was one of subjects of Ministry\u2019s project which was implemented by Vietnamese Academy of Forest Sciences from 2014-2018 in North, Center and Southeast regions. Objective of breeding trial in Phu Yen was to select a potential provenance and family of Ailanthus <\/em>for afforestation. The method of plus tree selection and breeding trial was carried out base on TCN – 147 – 2006 standard of Ministry of Agriculture and Rural development. The research results shows that: There were 3 provenances (Tuyen Quang, Quang Nam, Phu Yen) and 14 among 42 families of 8 provenances in the trial which had the tree volume over 10% to compare with average value of tree volume of the trial. In addition, annual increment of D1.3<\/sub> and height reached more than 1.8 cm\/year and 1.3m\/year respectively, that is a good indicators for native tree species. Base on other request of breeding selection, the afforestation programs in Phu Yen should be to use 2 the best provenances (which are Tuyen Quang (TQ), Quang Nam (QN)) or the best families of TQ1, TQ2, TQ3 and QN6, QN17, QN24, QN27, QN33. Phu Yen provenance with only 2 families involving in the trial shoul be continued to experiment and is not selected now. In addition, families of other provenances, such as PT3, PT11; VP6, VP14; \u0110N12; BP18 also adapted the standards of breeding selection and can be considered to use in the future.<\/p>\n

Keywords:<\/em><\/strong> Plus trees, family, trial, provenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT TR\u1ed2NG TH\u00c2M CANH V\u00c0 B\u1ea2O QU\u1ea2N QU\u1ea2 SA NH\u00c2N T\u00cdM (A<\/em>momum longiligulare<\/em> T.L.Wu)
\nT\u1ea0I KHU V\u1ef0C NGO\u1ea0I TH\u00c0NH H\u00c0 N\u1ed8I<\/p>\n

<\/a>1<\/sup>B\u00f9i Ki\u1ec1u H\u01b0ng, 2<\/sup>V\u00f5 \u0110\u1ea1i H\u1ea3i<\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, 2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

Sa nh\u00e2n ti\u0301m (Amomum longiligulare<\/em>) l\u00e0 lo\u1ea1i d\u01b0\u1ee3c li\u1ec7u qu\u00fd, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i huy\u1ec7n Ba V\u00ec, ngo\u1ea1i th\u00e0nh H\u00e0 N\u1ed9i. k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y m\u00e2\u0323t \u0111\u00f4\u0323 tr\u00f4\u0300ng ch\u01b0a co\u0301 a\u0309nh h\u01b0\u01a1\u0309ng ro\u0303 r\u00ea\u0323t t\u01a1\u0301i ty\u0309 l\u00ea\u0323 s\u00f4\u0301ng nh\u01b0ng c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1edbi s\u00f4\u0301 nha\u0301nh, chi\u00ea\u0300u cao c\u00e2y, s\u00f4\u0301 hoa va\u0300 s\u00f4\u0301 qua\u0309 cu\u0309a Sa nh\u00e2n ti\u0301m, trong \u0111o\u0301 m\u00e2\u0323t \u0111\u00f4\u0323 tr\u00f4\u0300ng 6.944 c\u00e2y\/ha la\u0300 t\u00f4\u0301t nh\u00e2\u0301t. Ph\u00e2n b\u00f3n ch\u01b0a co\u0301 a\u0309nh h\u01b0\u01a1\u0309ng ro\u0303 r\u00ea\u0323t t\u01a1\u0301i ty\u0309 l\u00ea\u0323 s\u00f4\u0301ng nh\u01b0ng \u0111a\u0303 co\u0301 a\u0309nh h\u01b0\u01a1\u0309ng ro\u0303 r\u00ea\u0323t t\u01a1\u0301i s\u00f4\u0301 nha\u0301nh va\u0300 chi\u00ea\u0300u cao c\u00e2y, s\u00f4\u0301 hoa va\u0300 s\u00f4\u0301 qua\u0309 cu\u0309a Sa nh\u00e2n ti\u0301m, trong \u0111\u00f3 b\u00f3n ph\u00e2n (2 kg ph\u00e2n chu\u1ed3ng + 100g NPK (5:10:3) + 200 g vi sinh S\u00f4ng Gianh) la\u0300 t\u00f4\u0301t nh\u00e2\u0301t. C\u00f4ng th\u01b0\u0301c ta\u0300n che 0,2 – 0,3 la\u0300 t\u00f4\u0301t nh\u00e2\u0301t. B\u1ea3o qu\u1ea3n qu\u1ea3n trong kho l\u1ea1nh \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 5 – 10o<\/sup>C, th\u1eddi gian b\u1ea3o qu\u1ea3n l\u00ean t\u1edbi tr\u00ean 18 th\u00e1ng ho\u1eb7c \u0111o\u0301ng go\u0301i trong bao bi\u0300 2 l\u01a1\u0301p \u0111\u00ea\u0309 ba\u0309o qua\u0309n trong kho kh\u00f4 ra\u0301o, th\u1eddi gian b\u1ea3o qu\u1ea3n c\u00f3 th\u1ec3 l\u00ean t\u1edbi 1,5 n\u0103m \u0111\u1ed1i v\u1edbi qu\u1ea3 lo\u1ea1i 1 v\u00e0 12 th\u00e1ng \u0111\u1ed1i v\u1edbi qu\u1ea3 lo\u1ea1i 2.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> K\u1ef9 thu\u1eadt tr\u1ed3ng, b\u1ea3o qu\u1ea3n qu\u1ea3, Sa nh\u00e2n t\u00edm, ngo\u1ea1i th\u00e0nh H\u00e0 N\u1ed9i<\/td>\n<\/tr>\n

<\/a>Research on intensive planting techniques and fruit preservation of (Amomum longiligulare<\/em> T.L.Wu) in a suburb of Ha Noi city<\/strong><\/p>\n

Amomum longiligulare<\/em> is a precious medicinal plant with high economic value. The research was carried out in Ba Vi district, a suburb of Ha Noi city. Research results show that planting density has not affected significally on survival rate but has affected on number of newly-born stems, height, flowering and fruiting of Amomum longiligulare<\/em>, of which planting density 6,944 plant\/ha is the best. Fertilizer application has not affected significally on survival rate but has affected on number of newly-born stems, height, flowing and fruiting, of which treatment of 2 kg muck + 100g NPK (5:10:3) + 200g micro-organic fertilizer of Song Gianh) is the best. Treatment of 0.2 – 0.3 light-shading is the best. Fruits can be preserved in cold storehouse at 5 – 10o<\/sup>C for more than 18 months or can be packed by two layer cover and keep in dry place for 1.5 years for fruit class 1 and 12 months for fruit class 2.<\/p>\n

Keywords:<\/em><\/strong> Planting techniques, fruit preservation, Amomum longiligulare<\/em>, suburb of Hanoi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U SINH KH\u1ed0I\u00a0\u00a0R\u1eeaNG V\u1ea6U \u0110\u1eaeNG (Indosasa angustata <\/em>Mc.Clure) THU\u1ea6N LO\u00c0I T\u1ea0I T\u1ec8NH B\u1eaeC K\u1ea0N<\/p>\n

<\/a>Ng\u00f4 Xu\u00e2n H\u1ea3i 1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup><\/p>\n

1<\/sup>Huy\u1ec7n \u1ee7y \u0110\u1ed3ng H\u1ef7, t\u1ec9nh Th\u00e1i Nguy\u00ean
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 3 huy\u1ec7n Ch\u1ee3 \u0110\u1ed3n, Na R\u00ec v\u00e0 B\u1ea1ch Th\u00f4ng, t\u1ec9nh B\u1eafc K\u1ea1n. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u \u00e1p d\u1ee5ng l\u00e0 l\u1eadp \u00f4 ti\u00eau chu\u1ea9n (\u00d4TC), gi\u1ea3i t\u00edch c\u00e2y ti\u00eau chu\u1ea9n v\u00e0 x\u1eed l\u00fd s\u1ed1 li\u1ec7u b\u1eb1ng to\u00e1n th\u1ed1ng k\u00ea trong sinh h\u1ecdc. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y sinh kh\u1ed1i kh\u00f4 c\u00e2y c\u00e1 l\u1ebb V\u1ea7u \u0111\u1eafng dao \u0111\u1ed9ng t\u1eeb 7,44 – 8,87 kg\/c\u00e2y v\u00e0 t\u1eadp trung ch\u1ee7 y\u1ebfu v\u00e0o ph\u1ea7n th\u00e2n kh\u00ed sinh (71,5%), c\u00e0nh (14,8%), th\u00e2n ng\u1ea7m (7,3%) v\u00e0 l\u00e1 (6,4%). T\u1ed5ng sinh kh\u1ed1i kh\u00f4 V\u1ea7u \u0111\u1eafng t\u00ednh trung b\u00ecnh cho c\u1ea5p m\u1eadt \u0111\u1ed9 I l\u00e0 19,79 t\u1ea5n\/ha, c\u1ea5p m\u1eadt \u0111\u1ed9 II l\u00e0 32,12 t\u1ea5n\/ha v\u00e0 c\u1ea5p m\u1eadt \u0111\u1ed9 III l\u00e0 47,42 t\u1ea5n\/ha. T\u1ed5ng sinh kh\u1ed1i kh\u00f4 to\u00e0n l\u00e2m ph\u1ea7n V\u1ea7u \u0111\u1eafng dao \u0111\u1ed9ng t\u1eeb 29,69 t\u1ea5n\/ha \u0111\u1ebfn 62,83 t\u1ea5n\/ha, trung b\u00ecnh l\u00e0 45,21 t\u1ea5n\/ha v\u00e0 ph\u1ee5 thu\u1ed9c r\u1ea5t l\u1edbn v\u00e0o m\u1eadt \u0111\u1ed9 r\u1eebng c\u0169ng nh\u01b0 \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u. Sinh kh\u1ed1i kh\u00f4 t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf t\u1ea7ng c\u00e2y cao V\u1ea7u \u0111\u1eafng (71,5%) v\u00e0 sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng (21,7%), sinh kh\u1ed1i kh\u00f4 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i ch\u1ec9 chi\u1ebfm 6,8%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Sinh kh\u1ed1i, V\u1ea7u \u0111\u1eafng, t\u1ec9nh B\u1eafc K\u1ea1n<\/td>\n<\/tr>\n

<\/a>Research on carbon sequestration of Indosasa angustata <\/em>Mc.Clure in Bac Kan province<\/strong><\/p>\n

Research was carried out in 3 districts: Cho Don, Na Ri and Bach Thong, Bac Kan province. Research methods are temporary sample plots, analytic sample individual trees and data analysis by statistical mathematics. Research results show biomass of individual tree of Indosasa angustata<\/em> varies from 7.44 – 8.87 kg\/tree and concentrates in above-ground stem (71.5%), branches (14.8%), underground stem (7.3%) and leaves (6.4%). Total dry biomass of Indosasa angustata<\/em> on everage for density class I is 19.79 tons\/ha, density class II is 32.12 tons\/ha and density class III is 47.42 tons\/ha. Total dry biomass of Indosasa angustata<\/em> stand veries from 29.69 tons\/ha to 62.83 tons\/ha, everage is 45.21 tons\/ha and depends greatly on stand density and research location as well. Dry biomass concentrates mainly on Indosasa angustata<\/em> layer (71.5%) and litter biomass (21.7%), shrub biomass occupied only 6.8%.<\/p>\n

Keywords:<\/em><\/strong> Biomass, Indosasa angustata<\/em> Mc.Clure, Bac Kan province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U SINH KH\u1ed0I V\u00c0 \u0110\u1ed8NG TH\u00c1I SINH KH\u1ed0I\u00a0\u00a0R\u1eeaNG LU\u1ed2NG (<\/em>Dendrocalamus barbatus <\/em>Hsueh Et D. Z.Li) <\/em>TR\u1ed2NG THU\u1ea6N LO\u00c0I T\u1ea0I THANH H\u00d3A<\/p>\n

<\/a>1<\/sup>Nguy\u1ec5n \u0110\u1ee9c H\u1ea3i, 2<\/sup>Nguy\u1ec5n Ho\u00e0ng Ti\u1ec7p<\/p>\n

1<\/sup>Trung t\u00e2m Khuy\u1ebfn n\u00f4ng Qu\u1ed1c gia, 2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 4 huy\u1ec7n c\u00f3 di\u1ec7n t\u00edch r\u1eebng Lu\u1ed3ng tr\u1ed3ng l\u1edbn nh\u1ea5t t\u1ec9nh Thanh H\u00f3a l\u00e0 Quan H\u00f3a, Lang Ch\u00e1nh, Ng\u1ecdc L\u1eb7c v\u00e0 B\u00e1 Th\u01b0\u1edbc. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y sinh kh\u1ed1i kh\u00f4 c\u1ee7a l\u00e2m ph\u1ea7n Lu\u1ed3ng ch\u1ee7 y\u1ebfu t\u1eadp trung \u1edf sinh kh\u1ed1i c\u1ee7a c\u00e2y Lu\u1ed3ng (chi\u1ebfm t\u1eeb 80,67 – 85,97%, trung b\u00ecnh chi\u1ebfm 84,14%), trong \u0111\u00f3 sinh kh\u1ed1i kh\u00f4 c\u1ee7a r\u1ec5 chi\u1ebfm trung b\u00ecnh 7,88%, sinh kh\u1ed1i kh\u00f4 trung b\u00ecnh c\u1ee7a v\u1eadt r\u01a1i r\u1ee5ng 6,56% v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 sinh kh\u1ed1i kh\u00f4 c\u1ee7a c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i l\u00e0 1,42%. L\u01b0\u1ee3ng sinh kh\u1ed1i kh\u00f4 l\u1ea5y ra kh\u1ecfi r\u1eebng dao \u0111\u1ed9ng t\u1eeb 5,53 t\u1ea5n\/ha\/n\u0103m \u0111\u1ed1i v\u1edbi r\u1eebng \u1edf c\u1ea5p tu\u1ed5i I v\u00e0 t\u0103ng \u0111\u1ebfn 9,32 t\u1ea5n\/ha\/n\u0103m khi r\u1eebng \u1edf c\u1ea5p tu\u1ed5i V v\u00e0 gi\u1ea3m xu\u1ed1ng 8,65 t\u1ea5n\/ha khi \u1edf c\u1ea5p tu\u1ed5i VI. V\u1ec1 c\u1ea5u tr\u00fac l\u01b0\u1ee3ng sinh kh\u1ed1i l\u1ea5y ra kh\u1ecfi r\u1eebng, ch\u1ee7 y\u1ebfu t\u1eadp trung \u1edf th\u00e2n kh\u00ed sinh c\u1ee7a Lu\u1ed3ng chi\u1ebfm 80%, ti\u1ebfp \u0111\u1ebfn l\u00e0 sinh kh\u1ed1i c\u00e0nh (chi\u1ebfm 20%). \u0110\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c 8 ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa sinh kh\u1ed1i t\u1ea7ng c\u00e2y Lu\u1ed3ng v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>Sinh kh\u1ed1i, \u0111\u1ed9ng th\u00e1i sinh kh\u1ed1i, r\u1eebng Lu\u1ed3ng, t\u1ec9nh Thanh H\u00f3a<\/td>\n<\/tr>\n

<\/a>Research on biomass and biomass dinamics of pure Dendrocalamus barbatus <\/em>Hsueh et D. Z.Li plantation in Thanh Hoa province<\/strong><\/p>\n

This research was carried out in 4 districts: Quan Hoa, Lang Chanh, Ngoc Lac and Ba Thuoc, Thanh Hoa province. Research results show that dry biomass of Dendrocalamus barbatus<\/em> stand concentrates in biomass of Dendrocalamus barbatus<\/em> (occupied 80.67 – 85.97%, average is 84.14%), of which dry biomass of roots occupied average 7.88%, average dry biomass of litter is 6.56% and the lowest is dry biomass of ground vegetation cover 1.42%. Dry biomass taken out from plantation varies from 5.53 tons\/ha\/year for plantation of I age class and gradually increase to 9.32 tons\/ha\/year when plantation at V age class then decrease to 8.65 tons\/ha when plantation at VI age class. Concerning structure of biomass taken out from plantation, biomass mainly concentrates in stem of Dendrocalamus barbatus <\/em>with 80%, following is biomass of branches (occupied 20%). 8 correlational equations between biomass of Dendrocalamus barbatus<\/em> and stand inventory parameters have been established.<\/p>\n

Keywords: <\/em><\/strong>Biomass, biomass dynamics, Dendrocalamus barbatus<\/em>, Thanh Hoa province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A C\u00c1C NH\u00c2N T\u1ed0 SINH TH\u00c1I \u0110\u1ebeN\u00a0M\u1eacT \u0110\u1ed8 PH\u00c2N B\u1ed0 TH\u00d4NG N\u0102M L\u00c1 (Pinus dalatensis<\/em> Ferr\u00e9)
\n\u1ede T\u00c2Y NGUY\u00caN<\/p>\n

<\/a>L\u00ea C\u1ea3nh Nam1<\/sup>, Nguy\u1ec5n Th\u00e0nh M\u1ebfn1<\/sup>, H\u1ed3 Ng\u1ecdc Th\u1ecd2<\/sup> v\u00e0 B\u1ea3o Huy3<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean
\n2<\/sup>V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh, t\u1ec9nh Gia Lai
\n3 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u00f4ng n\u0103m l\u00e1 (Pinus dalatensis<\/em> Ferr\u00e9) l\u00e0 lo\u00e0i \u0111\u1eb7c h\u1eefu c\u1ee7a d\u00e3y Tr\u01b0\u1eddng S\u01a1n, ch\u1ec9 c\u00f2n \u00edt v\u00f9ng ph\u00e2n b\u1ed1 v\u00e0 s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 tr\u00ean m\u1ed7i v\u00f9ng l\u00e0 kh\u00f4ng nhi\u1ec1u. Nh\u00e2n t\u1ed1 sinh th\u00e1i c\u00f3 vai tr\u00f2 quan tr\u1ecdng v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e2n b\u1ed1, sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n v\u00e0 t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00e1 th\u1ec3 c\u0169ng nh\u01b0 qu\u1ea7n th\u1ec3. V\u00ec v\u1eady, x\u00e1c \u0111\u1ecbnh nh\u00e2n t\u1ed1 sinh th\u00e1i ch\u1ee7 \u0111\u1ea1o \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eadt \u0111\u1ed9 ph\u00e2n b\u1ed1 c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng trong qu\u1ea3n l\u00fd b\u1ea3o t\u1ed3n lo\u00e0i, qu\u1ea7n th\u1ec3, ph\u1ee5c h\u1ed3i r\u1eebng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c t\u1ed5 h\u1ee3p sinh th\u00e1i. Nghi\u00ean c\u1ee9u n\u00e0y th\u1ef1c hi\u1ec7n t\u1ea1i T\u00e2y Nguy\u00ean, v\u1edbi 19 \u0111i\u1ec3m nghi\u00ean c\u1ee9u, m\u1ed7i \u0111i\u1ec3m c\u00f3 di\u1ec7n t\u00edch 1 km2 <\/sup>\u0111\u01b0\u1ee3c l\u1eadp v\u1edbi 173 \u00f4 m\u1eabu, m\u1ed7i \u00f4 c\u00f3 di\u1ec7n t\u00edch 1.000 m2<\/sup> \u0111\u01b0\u1ee3c \u0111o \u0111\u1ebfm m\u1eadt \u0111\u1ed9 Th\u00f4ng n\u0103m l\u00e1 (N) v\u00e0 10 nh\u00e2n t\u1ed1 sinh th\u00e1i ch\u00ednh tr\u00ean ba v\u00f9ng ph\u00e2n b\u1ed1. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh \u0111a bi\u1ebfn tuy\u1ebfn t\u00ednh\/phi tuy\u1ebfn t\u00ednh c\u00f3 tr\u1ecdng s\u1ed1 \u0111\u1ec3 l\u1eadp v\u00e0 th\u1ea9m \u0111\u1ecbnh sai s\u1ed1 c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n N theo c\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i \u1ea3nh h\u01b0\u1edfng. K\u1ebft qu\u1ea3 \u0111\u00e3 l\u1ef1a ch\u1ecdn m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n N theo ba nh\u00e2n t\u1ed1 sinh th\u00e1i \u1ea3nh h\u01b0\u1edfng l\u00e0 \u0111\u1ed9 cao so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n (DC), \u0111\u1ed9 d\u00e0y t\u1ea7ng \u0111\u1ea5t (TDD) v\u00e0 l\u01b0\u1ee3ng m\u01b0a trung b\u00ecnh n\u0103m (P): N = P \u00d7 (0,890614 \u00d7 DC-0,0451131<\/sup> \u00d7 TDD0,540172<\/sup> \u00d7 P-0,9126<\/sup>).<\/em><\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u00f4 h\u00ecnh, ph\u00e2n b\u1ed1 m\u1eadt \u0111\u1ed9, sinh th\u00e1i, Th\u00f4ng n\u0103m l\u00e1,\u00a0T\u00e2y Nguy\u00ean<\/td>\n<\/tr>\n

<\/a>Ecological factors impact on density distribution of Pinus dalatensis<\/em> Ferr\u00e9 species in the Central Highlands of Vietnam<\/strong><\/p>\n

Pinus dalatensis<\/em> Ferr\u00e9, an endemic species in Annamite range, with few distributive areas and the individual number of each area is low. Ecological factors have an important role and affect density distribution of species, growth, development and stable of the stand. So that, identifying main ecological factors are very meaningful for species\/stand conservation, reforestation. In this study, there were 19 areas 1 km2<\/sup> including 173 sample plots 1,000 m2<\/sup> were set up in three sites of Central Highlands for measuring density distribution of P. dalatensis<\/em> species (N) and together with 10 ecological factors. Using weighted multi-variables linear\/non-linear regression we developed and validated the models to predict the N through main ecological factors. As a result, we determined three main ecological factors were altitude (DC), soil thickness (TDD) and precipitation (P) that affected the N based on selected model: N = P \u00d7 (0.890614 \u00d7 DC-0,0451131<\/sup> \u00d7 TDD0,540172<\/sup> \u00d7 P-0,9126<\/sup>)<\/em><\/p>\n

Keywords:<\/em><\/strong> Central Highlands, density distribution, ecological factor, modelling, Pinus dalatensis<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG M\u1ed8T S\u1ed0 NH\u00c2N T\u1ed0 KH\u00cd H\u1eacU\u00a0\u0110\u1ebeN SINH TR\u01af\u1edeNG V\u1ec0 CHI\u1ec0U CAO TH\u00c2N C\u1ee6A TH\u1ea0CH T\u00d9NG R\u0102NG (Huperzia serrata <\/em>(Thunb. Ex Murray) Trevis.) \u1ede VI\u1ec6T NAM<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb \u00c1i Minh1<\/sup>, L\u00ea Ng\u1ecdc Tri\u1ec7u1<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn1*<\/sup>, N\u00f4ng V\u0103n Duy2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc T\u00e2y Nguy\u00ean, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc Vi\u1ec7t Nam
\n1*<\/sup> Ch\u1ecbu tr\u00e1ch nhi\u1ec7m ch\u00ednh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao th\u00e2n h\u00e0ng n\u0103m c\u1ee7a Th\u1ea1ch t\u00f9ng r\u0103ng \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u t\u1ea1i 3 qu\u1ea7n th\u1ec3 \u1edf Vi\u1ec7t Nam, bao g\u1ed3m qu\u1ea7n th\u1ec3 Ho\u00e0ng Li\u00ean ph\u00e2n b\u1ed1 t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Ho\u00e0ng Li\u00ean, qu\u1ea7n th\u1ec3 Ng\u1ecdc Linh (Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Ng\u1ecdc Linh) v\u00e0 qu\u1ea7n th\u1ec3 Bidoup (V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, h\u00e0ng n\u0103m, chi\u1ec1u cao th\u00e2n c\u1ee7a Th\u1ea1ch t\u00f9ng r\u0103ng t\u0103ng m\u1ed9t \u0111o\u1ea1n t\u1eeb 23 – 25,5 mm v\u00e0 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao b\u00ecnh qu\u00e2n h\u00e0ng n\u0103m c\u1ee7a Th\u1ea1ch t\u00f9ng r\u0103ng thu\u1ed9c 3 qu\u1ea7n th\u1ec3 kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a th\u1ed1ng k\u00ea. Th\u1ea1ch t\u00f9ng r\u0103ng th\u1ec3 hi\u1ec7n t\u00ednh m\u1ec1m d\u1ebbo ki\u1ec3u h\u00ecnh cao trong t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao v\u1edbi ch\u1ec9 s\u1ed1 m\u1ec1m d\u1ebbo ki\u1ec3u h\u00ecnh dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 0,73 \u0111\u1ebfn 0,81, tuy nhi\u00ean Bidoup l\u00e0 qu\u1ea7n th\u1ec3 c\u00f3 t\u00ednh m\u1ec1m d\u1ebbo v\u1ec1 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao th\u00e2n cao nh\u1ea5t, ti\u1ebfp \u0111\u1ebfn l\u00e0 Ho\u00e0ng Li\u00ean v\u00e0 Ng\u1ecdc Linh.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>Huperzia serrata, <\/em>t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao th\u00e2n h\u00e0ng n\u0103m, Th\u1ea1ch t\u00f9ng r\u0103ng, t\u00ednh m\u1ec1m d\u1ebbo ki\u1ec3u h\u00ecnh, ch\u1ec9 s\u1ed1 m\u1ec1m d\u1ebbo ki\u1ec3u h\u00ecnh<\/td>\n<\/tr>\n

<\/a>Effect of climate elements on shoot growth of Huperzia serrata<\/em> from Vietnam<\/strong><\/p>\n

Annual growth of Huperzia serrata <\/em>was investigated in three populations in Vietnam, including Hoang Lien population (Hoang Lien National Park), Ngoc Linh population (Ngoc Linh National Reserve) and Bidoup population (Bidoup National Park). The results showed that adult plants grew annually from 23 mm to 25.5 mm. Moreover, annual shoot growth of H. serrata<\/em> in the three populations did not have significant differrences. H. serrata<\/em> had great phenotypic plasticity in annual shoot growth with phenotypic plasticity index ranging from 0.73 to 0.81, however, phenotypic plasticity index of Bidoup population higher than Hoang Lien and Ngoc Linh population.<\/p>\n

Keywords: <\/em><\/strong>Annual shoot growth, Huperzia serrata, <\/em>phenotypic plasticity, phenotypic plasticity index<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U PH\u00c2N CHIA L\u1eacP \u0110\u1ecaA V\u00d9NG VEN BI\u1ec2N MI\u1ec0N TRUNG L\u00c0M C\u01a0 S\u1ede CHO TR\u1ed2NG R\u1eeaNG NG\u1eacP M\u1eb6N<\/p>\n

<\/a>Ho\u00e0ng V\u0103n Th\u01a1i<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u ph\u00e2n chia l\u1eadp \u0111\u1ecba ng\u1eadp m\u1eb7n v\u00f9ng ven bi\u1ec3n mi\u1ec1n Trung \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 1 \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2015, t\u1ea1i ven bi\u1ec3n c\u00e1c t\u1ec9nh t\u1eeb Ngh\u1ec7 An \u0111\u1ebfn Kh\u00e1nh H\u00f2a, \u0111\u1ea1i di\u1ec7n cho v\u00f9ng ven bi\u1ec3n mi\u1ec1n Trung (VBMT). K\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t \u0111\u00e3 ch\u1ec9 ra v\u00f9ng VBMT c\u00f3 3 d\u1ea1ng \u0111\u1ecba m\u1ea1o ch\u1ee7 y\u1ebfu l\u00e0 v\u0169ng v\u1ecbnh, ven s\u00f4ng v\u00e0 \u0111\u1ea7m ph\u00e1; c\u00e1c y\u1ebfu t\u1ed1 l\u1eadp \u0111\u1ecba ch\u00ednh g\u1ed3m th\u1ec3 n\u1ec1n, m\u1ee9c \u0111\u1ed9 ng\u1eadp tri\u1ec1u v\u00e0 \u0111\u1ed9 m\u1eb7n. Theo \u0111\u00f3, th\u1ec3 n\u1ec1n c\u00f3 3 d\u1ea1ng: c\u00e1t, c\u00e1t pha v\u00e0 b\u00f9n c\u00e1t; m\u1ee9c \u0111\u1ed9 ng\u1eadp tri\u1ec1u \u0111\u01b0\u1ee3c ph\u00e2n l\u00e0m 3 c\u1ea5p: ng\u1eadp tri\u1ec1u th\u1ea5p, ng\u1eadp tri\u1ec1u trung b\u00ecnh v\u00e0 ng\u1eadp tri\u1ec1u cao; \u0111\u1ed9 m\u1eb7n thay \u0111\u1ed5i r\u1ea5t l\u1edbn t\u1eeb 0 \u0111\u1ebfn 55\u2030 t\u00f9y theo v\u00f9ng v\u00e0 theo m\u00f9a, \u0111\u01b0\u1ee3c ph\u00e2n ra 3 c\u1ea5p: m\u1eb7n \u00edt, m\u1eb7n trung b\u00ecnh v\u00e0 m\u1eb7n n\u1eb7ng; th\u1ef1c v\u1eadt ng\u1eadp m\u1eb7n g\u1ed3m 12 lo\u00e0i t\u1ea1i v\u00f9ng B\u1eafc Trung B\u1ed9 v\u00e0 17 lo\u00e0i t\u1ea1i Nam Trung B\u1ed9 \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn. Tr\u00ean c\u01a1 s\u1edf \u0111\u00f3 \u0111\u00e3 ph\u00e2n chia th\u00e0nh 27 d\u1ea1ng l\u1eadp \u0111\u1ecba v\u1edbi 8 d\u1ea1ng nh\u00f3m l\u1eadp \u0111\u1ecba ch\u00ednh, nh\u00f3m A, B, C cho v\u00f9ng v\u0169ng v\u1ecbnh, g\u1ed3m: \u0111\u1ea5t c\u00e1t, ng\u1eadp tri\u1ec1u th\u1ea5p – CTt; \u0111\u1ea5t c\u00e1t, ng\u1eadp tri\u1ec1u trung b\u00ecnh – CT; \u0111\u1ea5t c\u00e1t, ng\u1eadp tri\u1ec1u cao – CTc; \u0111\u1ea5t c\u00e1t pha, ng\u1eadp tri\u1ec1u th\u1ea5p – CpTt; \u0111\u1ea5t c\u00e1t pha, ng\u1eadp tri\u1ec1u trung b\u00ecnh – CpT; \u0111\u1ea5t c\u00e1t pha, ng\u1eadp tri\u1ec1u cao – CpTc; \u0111\u1ea5t b\u00f9n c\u00e1t, ng\u1eadp tri\u1ec1u th\u1ea5p – BcTt; \u0111\u1ea5t b\u00f9n c\u00e1t, ng\u1eadp tri\u1ec1u trung b\u00ecnh – BcT; \u0111\u1ea5t b\u00f9n c\u00e1t, ng\u1eadp tri\u1ec1u cao – BcTc; nh\u00f3m D, E, F cho v\u00f9ng ven s\u00f4ng, g\u1ed3m: \u0111\u1ea5t m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u th\u1ea5p – MTt; \u0111\u1ea5t m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u trung b\u00ecnh – MT; \u0111\u1ea5t m\u1eb7n \u00edt, ng\u1eadp tri\u1ec1u th\u1ea5p – MTt; \u0111\u1ea5t m\u1eb7n \u00edt, ng\u1eadp tri\u1ec1u trung b\u00ecnh – MiT; \u0111\u1ea5t m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u cao – MTc; \u0111\u1ea5t m\u1eb7n \u00edt, ng\u1eadp tri\u1ec1u cao – MiTc v\u00e0; nh\u00f3m G, H cho v\u00f9ng \u0111\u1ea7m ph\u00e1, g\u1ed3m; \u0111\u1ea5t c\u00e1t, m\u1eb7n n\u1eb7ng – CMn; \u0111\u1ea5t c\u00e1t pha, m\u1eb7n n\u1eb7ng – CpMn; \u0111\u1ea5t b\u00f9n c\u00e1t, m\u1eb7n n\u1eb7ng – BcMn; \u0111\u1ea5t c\u00e1t, m\u1eb7n \u00edt – CMi; \u0111\u1ea5t c\u00e1t pha, m\u1eb7n \u00edt – CpMi v\u00e0 \u0111\u1ea5t b\u00f9n c\u00e1t, m\u1eb7n \u00edt – BcMi).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1ed9 m\u1eb7n, l\u1eadp \u0111\u1ecba, r\u1eebng ng\u1eadp m\u1eb7n, th\u1ec3 n\u1ec1n, th\u1ee7y tri\u1ec1u<\/td>\n<\/tr>\n

<\/a>Study on zoning sites for mangrove plantation in the Central Coastal Region<\/strong><\/p>\n

The study on tide, salinity, topography\/geomorphology, soil and distribution of vegetation was carried out at 10 study sites representing the Mangrove Coastal Central Area from Nghe An to Khanh Hoa provinces in 2015. The results showed that there was the changes of tidal regime depending on each sub-region (tidal, semi-diurnal, and uneven tide) with the lowest tide amplitude in coastal Vietnam, which ranged from 1.1 to 2.7 m. Salinity varied greatly from 0 to 55\u2030 by region and season. The duration of the deep and prolonging floods in the rainy season resulted in the very low salinity or absolutely sweet (0\u2030) in the rivers and lagoons. Distribution of 12 mangrove species in the North Central Coast and 17 species in South Central Coast areas have been recorded. There were 8 types of sites including 3 main group: Group A, B, C for bays, gulfs areas: sand, mean sea level- CTt; sand, mean high water- CT; sand, mean high water at spring tide – CTc; loamy sand, mean sea level- CpTt; sandy loam, mean high water- CpT; loamy sand, mean high water at spring tide – CpTc; sandy loam, mean sea level- BcTt; sandy loam, mean high water- BcT; sandy loam, mean high water at spring tide – BcTc). Group D, E, and F for riverine areas: medium salty, mean level sea- MTt; medium salty, mean high water at neap tide – MT; soft salty, mean level sea – MTt; soft salty, mean high water at neap tide – MiT; medium salty, mean high water at spring tide- MTc; soft salt, mean high water at spring tide- MiTc. Group G, H for the lagoon area: sand, salty – CMn; loamy sand, salty – CpMn; sandy loam, salty – BcMn; sand, soft salty – CMi; loamy sand, soft salty – CpMi; sandy loam, soft salt – BcMi.<\/p>\n

Keywords:<\/em><\/strong> Mangrove, salinity, sites, soils, tidal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u00c0NH PH\u1ea6N LO\u00c0I X\u00c9N T\u00d3C (Coleoptera: Cerambycidae) T\u1ea0I R\u1eeaNG TR\u1ed2NG TH\u00d4NG M\u00c3 V\u0128, TH\u00d4NG NH\u1ef0A V\u00c0 TH\u00d4NG BA L\u00c1<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u00e0nh, \u0110\u00e0o Ng\u1ecdc Quang, Tr\u1ea7n Vi\u1ebft Th\u1eafng v\u00e0 Trang A T\u1ed5ng<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1eed d\u1ee5ng b\u1eaby pheromon ZM-80B v\u1edbi m\u1ed3i nh\u1eed APF-I \u0111\u1ec3 thu b\u1eaft tr\u01b0\u1edfng th\u00e0nh x\u00e9n t\u00f3c t\u1ea1i r\u1eebng tr\u1ed3ng Th\u00f4ng m\u00e3 v\u0129 (SC1), Th\u00f4ng nh\u1ef1a (SC2) v\u00e0 Th\u00f4ng ba l\u00e1 (SC3) trong th\u1eddi gian 1 n\u0103m (th\u00e1ng 8\/2017 \u0111\u1ebfn th\u00e1ng 7\/2018) thu \u0111\u01b0\u1ee3c 15 lo\u00e0i x\u00e9n t\u00f3c v\u1edbi t\u1ed5ng s\u1ed1 5.444 c\u00e1 th\u1ec3 thu\u1ed9c 3 ph\u00e2n h\u1ecd: Ph\u00e2n h\u1ecd Lamiinae c\u00f3 s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i nhi\u1ec1u nh\u1ea5t (8 lo\u00e0i), chi\u1ebfm 53,3%; ph\u00e2n h\u1ecd Cerambycinae c\u00f3 4 lo\u00e0i, chi\u1ebfm 26,7% v\u00e0 ph\u00e2n h\u1ecd Prioninae c\u00f3 3 lo\u00e0i, chi\u1ebfm 20%; trong \u0111\u00f3 lo\u00e0i Monochamus alternatus <\/em>Hope c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 nhi\u1ec1u nh\u1ea5t t\u1ea1i c\u1ea3 3 sinh c\u1ea3nh (4.943 c\u00e1 th\u1ec3, chi\u1ebfm 90,79%). T\u1ea1i SC1 thu \u0111\u01b0\u1ee3c s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i nhi\u1ec1u nh\u1ea5t (8 lo\u00e0i) v\u1edbi 4.407 c\u00e1 th\u1ec3 ; SC2 thu \u0111\u01b0\u1ee3c 5 lo\u00e0i v\u1edbi 375 c\u00e1 th\u1ec3 v\u00e0 SC3 ghi nh\u1eadn 6 lo\u00e0i v\u1edbi 662 c\u00e1 th\u1ec3. Ch\u1ec9 s\u1ed1 phong ph\u00fa Margalef (d=7,88) v\u00e0 ch\u1ec9 s\u1ed1 \u01b0u th\u1ebf Simpson (\u03bb=0,95) t\u1ea1i SC1 l\u00e0 l\u1edbn nh\u1ea5t, ch\u1ec9 s\u1ed1 Shannon-Weaver (H\u2019=0,93) l\u1edbn nh\u1ea5t t\u1ea1i SC3 v\u00e0 ch\u1ec9 s\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u Pielou (J\u2019=1,28) l\u1edbn nh\u1ea5t t\u1ea1i SC2. Th\u00e1ng 6 ghi nh\u1eadn s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a lo\u00e0i v\u00e0 s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 nhi\u1ec1u nh\u1ea5t (8 lo\u00e0i v\u1edbi 1.172 c\u00e1 th\u1ec3).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Th\u00f4ng m\u00e3 v\u0129, Th\u00f4ng nh\u1ef1a, Th\u00f4ng ba l\u00e1, x\u00e9n t\u00f3c, b\u1eaby pheromon<\/td>\n<\/tr>\n

<\/a>Composition of longhorn beetles (Coleoptera: Cerambycidae) in Pinus massoniana<\/em>, Pinus merkusii<\/em> and Pinus kesiya<\/em> plantations<\/strong><\/p>\n

U<\/strong>sing the pheromon ZM-80B trap with APF-I type attractants to collect adult of longhorn beetle in P.massoniana <\/em>(SC1), P.merkusii <\/em>(SC2), P.kesiya<\/em> (SC3) plantation for 1 year (August 2017 to July 2018), the results recorded 15 species with a total of 5,444 individuals of 3 subfamilies: Lamiinae subfamily has the highest number of species (8 species), accounting for 53.3%; Cerambycinae has 4 species, accounting for 26.7% and Prioninae has 3 species, accounting for 20%; of which M.alternatus<\/em> Hope has the highest number of individuals in all three habitats (4,943 individuals, accounting for 90.79%). At habitat 1 (SC1), the highest number of species (8 species) was collected with 4,407 individuals; habitat 2 (SC2) collected 5 species. Margalef index (d = 7.88) and Simpson index (\u03bb = 0.95) was the highest in the P.<\/em>massoniana <\/em>plantation, the Shannon-Weaver index (H ‘= 0.93) was highest in the P.kesiya<\/em> plantation and the Pielou index (J ‘= 1.28) was highest in the P.merkusii <\/em>plantation. In June recorded the occurrence of species and the highest number of individuals (8 species with 1,172 individuals).<\/p>\n

Keywords:<\/em><\/strong> Pinus massoniana, Pinus merkusii, Pinus kesiya<\/em>, longhorn beetle, pheromone trap<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>Project investigators<\/p>\n\n\n\n\n
SUMMARY<\/p>\n

The study was carried out in six villages of Thua Thien Hue and Quang Tri provinces. Results from survey indicated that plantations have positive impacts on livelihoods and wellbeing, including financial and income benefits, social status, psychological benefits such as self-esteem and ability to influence other community members. Timber sales (25% of total HH income) and plantation wage labour (22%) were the top two income sources for local households. Due to decreased land availability, allocations to more recent migrants have been smaller. Those allocated larger land areas have higher incomes and greater human capital and social capital. While incomes have increased for those with smaller land areas (<2 ha), other dimensions of poverty are apparent, such as lower income, vulnerability, reduced agency and power. A minimum of 4-5 ha is required to ensure enough income for households to escape poverty. Human resources and capacity, especially at provincial level, to accelerate forest land allocation and to plan, implement and monitor effective land management systems should be improved. Mass organizations are important institutions with a high level of trust need to be mobilized and supported with appropriate mandates and capacity building to deal with land processes and conflict management; Support information and networks for smallholder engagement with timber markets and supply chains; and Raise awareness of the ecological impacts and benefits of plantations, implement codes of practice for plantations and encourage certification are the recommendations of the study.<\/td>\n<\/tr>\n

<\/a>R\u1eebng tr\u1ed3ng v\u00e0 sinh k\u1ebf h\u1ed9 gia \u0111\u00ecnh: Tr\u01b0\u1eddng h\u1ee3p nghi\u00ean c\u1ee9u \u1edf mi\u1ec1n Trung Vi\u1ec7t Nam<\/strong><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 6 th\u00f4n c\u1ee7a t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf v\u00e0 Qu\u1ea3ng Tr\u1ecb. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng r\u1eebng tr\u1ed3ng c\u00f3 nh\u1eefng t\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c \u0111\u1ed1i v\u1edbi sinh k\u1ebf v\u00e0 s\u1ef1 th\u1ecbnh v\u01b0\u1ee3ng, bao g\u1ed3m c\u1ea3 nh\u1eefng l\u1ee3i \u00edch v\u1ec1 t\u00e0i ch\u00ednh, thu nh\u1eadp v\u00e0 \u0111\u1ecba v\u1ecb x\u00e3 h\u1ed9i, t\u00e2m l\u00fd nh\u01b0 l\u00e0 s\u1ef1 t\u1ef1 tin v\u00e0 kh\u1ea3 n\u0103ng \u1ea3nh h\u01b0\u1edfng t\u00edch c\u1ef1c \u0111\u1ebfn c\u00e1c th\u00e0nh vi\u00ean c\u1ed9ng \u0111\u1ed3ng kh\u00e1c. Thu nh\u1eadp t\u1eeb vi\u1ec7c b\u00e1n g\u1ed7 chi\u1ebfm 25% t\u1ed5ng thu nh\u1eadp h\u1ed9 gia \u0111\u00ecnh (HG\u0110) v\u00e0 c\u00f4ng lao \u0111\u1ed9ng tr\u1ed3ng r\u1eebng (chi\u1ebfm 22% t\u1ed5ng thu nh\u1eadp) l\u00e0 hai ngu\u1ed3n thu ch\u00ednh cho c\u00e1c HG\u0110 \u1edf \u0111\u1ecba ph\u01b0\u01a1ng. Do t\u00e0i nguy\u00ean \u0111\u1ea5t h\u1ea1n ch\u1ebf, n\u00ean vi\u1ec7c giao \u0111\u1ea5t cho nh\u1eefng h\u1ed9 di c\u01b0 \u0111\u1ebfn sau s\u1ebd gi\u1ea3m \u0111i. Nh\u1eefng HG\u0110 \u0111\u01b0\u1ee3c giao nhi\u1ec1u \u0111\u1ea5t h\u01a1n s\u1ebd c\u00f3 thu nh\u1eadp cao h\u01a1n v\u00e0 ngu\u1ed3n l\u1ef1c v\u00e0 v\u1ed1n x\u00e3 h\u1ed9i l\u1edbn h\u01a1n. M\u1eb7c d\u00f9 thu nh\u1eadp c\u1ee7a nh\u1eefng HG\u0110 c\u00f3 di\u1ec7n t\u00edch \u0111\u1ea5t nh\u1ecf (<2 ha) \u0111ang t\u0103ng l\u00ean, c\u00e1c kh\u00eda c\u1ea1nh ngh\u00e8o \u0111\u00f3i kh\u00e1c l\u1ea1i xu\u1ea5t hi\u1ec7n, nh\u01b0 l\u00e0 thu nh\u1eadp th\u1ea5p, d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng, quy\u1ec1n l\u1ef1c gi\u1ea3m. M\u1ed9t di\u1ec7n t\u00edch t\u1ed1i thi\u1ec3u c\u1ea7n kho\u1ea3ng 4-5 ha \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 thu nh\u1eadp cho nh\u1eefng HG\u0110 mu\u1ed1n tho\u00e1t ngh\u00e8o. C\u1ea3i thi\u1ec7n ngu\u1ed3n nh\u00e2n l\u1ef1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u1ea5p t\u1ec9nh \u0111\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh giao \u0111\u1ea5t giao r\u1eebng (G\u0110GR), v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch, th\u1ef1c hi\u1ec7n, gi\u00e1m s\u00e1t c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd \u0111\u1ea5t \u0111ai hi\u1ec7u qu\u1ea3; C\u00e1c t\u1ed5 ch\u1ee9c ch\u00ednh tr\u1ecb, x\u00e3 h\u1ed9i v\u1edbi s\u1ef1 uy t\u00edn cao \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c th\u00fac \u0111\u1ea9y v\u00e0 h\u1ed7 tr\u1ee3 ti\u1ebfn tr\u00ecnh G\u0110GR v\u00e0 qu\u1ea3n l\u00fd xung \u0111\u1ed9t; H\u1ed7 tr\u1ee3 v\u00e0 cung c\u1ea5p th\u00f4ng tin, m\u1ea1ng l\u01b0\u1edbi cho s\u1ef1 tham gia c\u1ee7a c\u00e1c ch\u1ee7 r\u1eebng nh\u1ecf v\u00e0o th\u1ecb tr\u01b0\u1eddng g\u1ed7 v\u00e0 chu\u1ed7i cung \u1ee9ng; v\u00e0 N\u00e2ng cao nh\u1eadn th\u1ee9c c\u1ee7a ng\u01b0\u1eddi d\u00e2n v\u1ec1 t\u00e1c \u0111\u1ed9ng sinh th\u00e1i v\u00e0 l\u1ee3i \u00edch c\u1ee7a r\u1eebng tr\u1ed3ng, th\u1ef1c hi\u1ec7n quy t\u1eafc th\u1ef1c h\u00e0nh cho r\u1eebng tr\u1ed3ng v\u00e0 khuy\u1ebfn kh\u00edch ch\u1ee9ng nh\u1eadn ch\u1ee9ng ch\u1ec9 r\u1eebng l\u00e0 nh\u1eefng khuy\u1ebfn ngh\u1ecb c\u1ee7a nghi\u00ean c\u1ee9u.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>HI\u1ec6U QU\u1ea2 KINH T\u1ebe M\u1ed8T S\u1ed0 M\u00d4 H\u00ccNH R\u1eeaNG TR\u1ed2NG KEO G\u1ed6 L\u1edaN T\u1ea0I V\u00d9NG \u0110\u00d4NG B\u1eaeC<\/p>\n

<\/a>V\u0169 V\u0103n Thu\u1eadn1<\/sup>, Di\u1ec7p Xu\u00e2n Tu\u1ea5n1<\/sup>, Tr\u1ea7n Duy R\u01b0\u01a1ng1<\/sup>, Ph\u1ea1m \u0110\u00f4n1<\/sup>, V\u0169 V\u0103n Tu\u00e2n2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao k\u1ef9 thu\u1eadt L\u00e2m sinh, Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n2<\/sup> Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p T\u00e2y B\u1eafc<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Hi\u1ec7u qu\u1ea3 m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng keo g\u1ed7 l\u1edbn t\u1ea1i v\u00f9ng \u0110\u00f4ng B\u1eafc \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra, \u0111\u00e1nh gi\u00e1 t\u1ea1i t\u1ec9nh Qu\u1ea3ng Ninh, Ph\u00fa Th\u1ecd. K\u1ebft qu\u1ea3 t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111i\u1ec1u tra cho th\u1ea5y, t\u1ea1i t\u1ec9nh Qu\u1ea3ng Ninh c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng g\u1ed7 l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb NPV \u0111\u1ea1t t\u1eeb 8,683 \u0111\u1ebfn 12,773 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m, trung b\u00ecnh \u0111\u1ea1t 10,46 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m v\u00e0 cao h\u01a1n m\u00f4 h\u00ecnh g\u1ed7 nh\u1ecf t\u1eeb 1,3 \u0111\u1ebfn 1,99 l\u1ea7n, trung b\u00ecnh g\u1ea5p 1,79 l\u1ea7n; T\u1ea1i t\u1ec9nh Ph\u00fa Th\u1ecd, c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng keo lai g\u1ed7 l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb NPV t\u1eeb 9,287 \u0111\u1ebfn 10,601 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m, trung b\u00ecnh l\u00e0 9,944 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m v\u00e0 cao h\u01a1n m\u00f4 h\u00ecnh g\u1ed7 nh\u1ecf t\u1eeb 1,29 \u0111\u1ebfn 1,4 l\u1ea7n v\u00e0 trung b\u00ecnh cao g\u1ea5p 1,4 l\u1ea7n, c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng g\u1ed7 l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb NPV t\u1eeb 9,332 \u0111\u1ebfn 9,711 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m, trung b\u00ecnh l\u00e0 9,522 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m v\u00e0 cao h\u01a1n m\u00f4 h\u00ecnh g\u1ed7 nh\u1ecf trung b\u00ecnh 1,30 l\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>Hi\u1ec7u qu\u1ea3, g\u1ed7 l\u1edbn, keo, v\u00f9ng \u0110\u00f4ng B\u1eafc<\/td>\n<\/tr>\n

<\/a>Economic efficiency of a number of saw log acacia plantation models in the Northeast region<\/strong><\/p>\n

The effectiveness of a number of saw log acacia plantation models in the Northeast was surveyed and evaluated in Quang Ninh and Phu Tho provinces. The survey results showed that in Quang Ninh province, the models of saw log Acacia mangium<\/em> Willd has gained NPV range from 8.683 to 12.773 million VND\/ha\/year, reached an average of 10.46 million VND\/ha\/year, which is higher than the small timber plantation model (from 1.3 to 1.99 times, or 1.79 times as an average); In Phu Tho province, the same model has gained NPV range from VND 9.287 to VND 10.601 million\/ha\/year, reached an average of VND 9,944 million\/ha\/year, which is higher than small timber plantation models from 1.29 to 1.4 times, ot1.4 times as an average. The models of Acacia mangium<\/em> Willd plantation have an NPV from 9.332 to 9.711 million VND\/ha\/year, reached an average of 9.522 million VND\/ha\/year, which is 1.30 times higher than the small timber model.<\/p>\n

Keywords: <\/em><\/strong>Efficiency, saw log plantation, acacia, Northeast region<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U C\u00d4NG NGH\u1ec6 CH\u1ebe BI\u1ebeN G\u1ed6 B\u1edcI L\u1edcI V\u00c0NG (Litsea pierrei<\/em> Lecomte)<\/p>\n

<\/a>B\u00f9i Duy Ng\u1ecdc1<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>, H\u00e0 Ti\u1ebfn M\u1ea1nh1<\/sup>, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng1<\/sup>,
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng1<\/sup>, Nguy\u1ec5n Anh Tu\u1ea5n2<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i3<\/sup>, Nguy\u1ec5n B\u1ea3o Ng\u1ecdc1<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2<\/sup> Trung t\u00e2m Nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9
\n3<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u1eddi l\u1eddi v\u00e0ng l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, ph\u00e2n b\u1ed1 kh\u00e1 r\u1ed9ng r\u00e3i \u1edf Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t l\u00e0 khu v\u1ef1c T\u00e2y Nguy\u00ean v\u00e0 \u0110\u00f4ng Nam B\u1ed9. Tuy nhi\u00ean, c\u00e1c c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u v\u1ec1 g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o l\u0129nh v\u1ef1c l\u00e2m sinh. Cho t\u1edbi nay, v\u1eabn ch\u01b0a c\u00f3 c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 c\u00f4ng ngh\u1ec7 s\u1ea5y hay ch\u1ebf bi\u1ebfn g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng v\u1edbi m\u1ee5c \u0111\u00edch ph\u1ee5c v\u1ee5 cho nhu c\u1ea7u g\u1ed7 x\u1ebb v\u00e0 s\u1ea3n xu\u1ea5t v\u00e1n b\u00f3c. Trong nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 x\u00e1c \u0111\u1ecbnh c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng \u1edf 3 n\u1ed9i dung: (1) \u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 tr\u00f2n v\u00e0 g\u1ed7 x\u1ebb; (2) \u1ea2nh h\u01b0\u1edfng c\u1ee7a ch\u1ebf \u0111\u1ed9 s\u1ea5y \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 x\u1ebb; v\u00e0 (3) C\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n b\u00f3c. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y g\u1ed7 tr\u00f2n B\u1eddi l\u1eddi v\u00e0ng kh\u00e1 th\u1eb3ng, tr\u00f2n \u0111\u1ec1u v\u00e0 \u0111\u1ed9 thon theo chi\u1ec1u d\u00e0i th\u00e2n kh\u00fac g\u1ed7 nh\u1ecf. Ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 theo ph\u01b0\u01a1ng ph\u00e1p x\u1ebb xoay t\u1ed1t h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p x\u1ebb su\u1ed1t. T\u1ef7 l\u1ec7 khuy\u1ebft t\u1eadt c\u1ee7a g\u1ed7 khi s\u1ea5y \u1edf ch\u1ebf \u0111\u1ed9 s\u1ea5y 60-80o<\/sup>C cao h\u01a1n nhi\u1ec1u so v\u1edbi 2 ch\u1ebf \u0111\u1ed9 s\u1ea5y 40-60o<\/sup>C v\u00e0 50-70o<\/sup>C. \u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t v\u00e1n b\u00f3c, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u0169ng cho th\u1ea5y g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 l\u00e0m nguy\u00ean li\u1ec7u cho v\u00e1n b\u00f3c. G\u1ed7 \u0111\u01b0\u1ee3c b\u00f3c v\u1edbi chi\u1ec1u d\u00e0y 2,2mm v\u00e0 \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u1ee7y nhi\u1ec7t tr\u01b0\u1edbc khi b\u00f3c \u1edf nhi\u1ec7t \u0111\u1ed9 80o<\/sup>C trong th\u1eddi gian 3 gi\u1edd cho ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n b\u00f3c d\u00f9ng l\u00e0m l\u1edbp m\u1eb7t v\u00e0 l\u1edbp l\u00f5i l\u00e0 t\u1ed1t nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>B\u1eddi l\u1eddi v\u00e0ng, g\u1ed7 x\u1ebb, ch\u1ebf \u0111\u1ed9 s\u1ea5y, v\u00e1n b\u00f3c<\/td>\n<\/tr>\n

<\/a>Study on wood processing technology for Litsea pierrei<\/em> Lecomte<\/strong><\/p>\n

Litsea pierrei<\/em> Lecomte is recognized as large-sized timber species, widely distributed in Vietnam, especially in Central Highland and South-East regions. However, the species have only been assessed in the field of silviculture. To date, drying and wood processing of this species have not been studied for the aim of sawn timber uses and veneer production. This study investigated the wood processing of Litsea pierrei<\/em> Lecomte at three aspects: (1) Evaluation of the logs and sawn timber; (2) Effects of different drying schedules on the quality of sawn timber; and (3) peeled veneer production. Results showed that the logs\/billets of Litsea pierrei<\/em> Lecomte were relatively straight and the difference between ends of the logs in relation to diameter was small. The quality of sawn timbers produced by back sawing method was better than that of flat sawing method. The rate of defects of the sawn timbers dried at 60-80o<\/sup>C was much higher than other drying schedules 40-60o<\/sup>C and 50-70o<\/sup>C. In relation to the veneer production, it indicated that the species met the requirements of raw materials for the veneer production. The optimal quality of Litsea pierrei<\/em> Lecomte veneers was achieved when the logs were preheated in the kiln using saturated steam at 80o<\/sup>C for 3 hours and then rotary peeled with a thickness of 2.2mm.<\/p>\n

Keywords: <\/em><\/strong>Litsea pierrei<\/em> Lecomte, sawn timber, drying schedule, peeled veneer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 PH\u01af\u01a0NG PH\u00c1P BA\u0309O QU\u1ea2N M\u1ed8C B\u1ea2N TRI\u1ec0U NGUY\u1ec4N B\u1eca M\u1ee6N M\u1ee4C B\u0102\u0300NG PARALOID B72<\/p>\n

<\/a>Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>, Nguy\u1ec5n Xu\u00e2n H\u00f9ng2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Trung t\u00e2m L\u01b0u tr\u1eef Qu\u1ed1c gia IV, C\u1ee5c V\u0103n th\u01b0 v\u00e0 L\u01b0u tr\u1eef Nh\u00e0 n\u01b0\u1edbc, B\u1ed9 N\u1ed9i v\u1ee5<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u x\u1eed l\u00fd b\u1ea3o qu\u1ea3n 7 lo\u1ea1i m\u1ed9c b\u1ea3n tri\u1ec1u Nguy\u1ec5n \u0111\u00e3 b\u1ecb m\u1ee7n m\u1ee5c b\u1eb1ng Paraloid B72 cho th\u1ea5y t\u00ednh ch\u1ea5t c\u1ee7a m\u1ed9c b\u1ea3n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. Vi\u1ec7c x\u1eed l\u00fd b\u1ea3o qu\u1ea3n m\u1ed9c b\u1ea3n b\u1eb1ng Paraloid B72 \u0111\u00e3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a g\u1ed7. V\u1edbi m\u1eabu m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c \u00edt, \u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc th\u1edb t\u0103ng trung b\u00ecnh 51-65% so v\u1edbi m\u1eabu \u0111\u1ed1i ch\u1ee9ng, \u0111\u1ea1t 24,1-26,3 MPa. V\u1edbi nh\u00f3m m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c trung b\u00ecnh, gi\u00e1 tr\u1ecb n\u00e0y t\u0103ng trung b\u00ecnh 43-117% so v\u1edbi m\u1eabu \u0111\u1ed1i ch\u1ee9ng, \u0111\u1ea1t 13,6-20,6 MPa. M\u1ee9c \u0111\u1ed9 t\u0103ng l\u1edbn nh\u1ea5t \u1edf m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c n\u1eb7ng (Umax<\/sub>=437%), \u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc th\u1edb t\u0103ng trung b\u00ecnh 110-250% so v\u1edbi m\u1eabu \u0111\u1ed1i ch\u1ee9ng, \u0111\u1ea1t 6,7-11,2 MPa. K\u1ebft qu\u1ea3 quan s\u00e1t c\u1ea5u tr\u00fac g\u1ed7 cho th\u1ea5y Paraloid B72 th\u1ea5m v\u00e0o v\u00e1ch t\u1ebf b\u00e0o v\u00e0 m\u1ed9t ph\u1ea7n ru\u1ed9t t\u1ebf b\u00e0o g\u1ed7 l\u00e0m cho c\u1ea5u tr\u00fac g\u1ed7 \u0111\u01b0\u1ee3c gia c\u01b0\u1eddng, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a m\u1ed9c b\u1ea3n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. \u0110\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 kinh t\u1ebf v\u00e0 hi\u1ec7u qu\u1ea3 b\u1ea3o qu\u1ea3n, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng 10% Paraloid B72 \u0111\u1ec3 x\u1eed l\u00fd b\u1ea3o qu\u1ea3n nh\u00f3m m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c nh\u1eb9; 15% Paraloid B72 \u0111\u1ec3 x\u1eed l\u00fd b\u1ea3o qu\u1ea3n nh\u00f3m m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c trung b\u00ecnh v\u00e0 20% Paraloid B72 \u0111\u1ec3 x\u1eed l\u00fd b\u1ea3o qu\u1ea3n nh\u00f3m m\u1ed9c b\u1ea3n b\u1ecb m\u1ee7n m\u1ee5c n\u1eb7ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>M\u1ed9c b\u1ea3n tri\u1ec1u Nguy\u1ec5n, x\u1eed l\u00fd b\u1ea3o qu\u1ea3n,\u00a0 Paraloid B72<\/td>\n<\/tr>\n

<\/a>Conservation of royal wooden printing blocks of the Nguyen Dynasty using Paraloid B72<\/strong><\/p>\n

In this article, the conservation of seven deteriorated Royal wooden printing blocks of the Nguyen Dynasty with Paraloid B72 was investigated. The results showed that the mechanical properties of deteriorated woodblocks significantly improved after the different treatments. The testing in compression parallel to grain of less deteriorated woodblocks increased by 51 – 65% in comparison with control samples, reached 24.1 – 26.3 MPa. With the medium deteriorated woodblocks, compression parallel to grain improved by 43 – 117% (equivalent to 13.6 – 20.6 MPa). The maximum effect was observed in highly deteriorated samples. The compression parallel to grain enhanced by 110 – 250%, varied from 6.7 to 11.2 MPa. Microscopic observations showed that the chemically treated woods maintained their original cell structures, forms, and shapes. It was also revealed that the reinforcement of cell walls by the Paraloid B72 primarily absorbed on the cell walls and filled several the wood voids. Based on the improved mechanical properties of wood, 10% Paraloid B72 can be used for less deteriorated woodblocks while 15% Paraloid B72 is suitable for medium deteriorated woodblocks. The largest amount of Paraloid B72 (20%) is required for the treatment of heavily deteriorated woodblocks.<\/p>\n

Keywords: <\/em><\/strong>Royal wooden printing blocks, conservation treatment, Paraloid B72<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1 – 2020 \u00a0 1. \u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac t\u1ed5 th\u00e0nh\u00a0 v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc c\u00e1c qu\u1ea7n th\u1ec3 \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn (Rhododendron moulmainense Hook. F.) t\u1ea1i L\u00e2m \u0110\u1ed3ng Characteristics of composition and biodiversity of Rhododendron moulmainense Hook. f. population in Lam Dong L\u01b0u Th\u1ebf Trung Ph\u00ed […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1753"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=1753"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1753\/revisions"}],"predecessor-version":[{"id":1756,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1753\/revisions\/1756"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

<\/a>FOREST PLANTATIONS AND SMALLHOLDER LIVELIHOODS: EVIDENCE FROM CENTRAL REGION OF VIETNAM<\/strong><\/p>\n